Cannot parse a Custom node as a function input to another Custom node in material editor. This is working as expected in 4.18 CL# 3832480.
Found in 4.19 CL# 4033788, 4.20 CL# 4302132, and 4.21 CL# 4329255
This is a regression.
An error will pop up like the attached image and take focus
The material would compile without error
There's no existing public thread on this issue, so head over toAnswerHub just mention UE-63534 in the post.